Question

According to the recommendations laid by the Concrete Association of India, what should be the least strength of the blocks used in concrete masonry?

(a) 3 N/mm^2

(b) 4 N/mm^2

(c) 2 N/mm^2

(d) 5 N/mm^2

This question was posed to me during an interview for a job.

I'd like to ask this question from Composite Masonry in portion Composite Masonry of Construction & Building Materials

Answer 1

Right answer is (a) 3 N/mm^2

The explanation is: Concrete Association of India recommends that the strength of the blocks used in concrete masonry should be at least 3 N/mm^2 and the recommended size of common blocks used in cement concrete masonry are 39 cm x 19 cm x 30 cm; 39 cm x 19 cm x 20 cm and 39 cm x 19 cm x 10 cm.